US 2019/0198908 A1 · SECONDARY BATTERY

Abstract

A secondary battery includes an electrode assembly including a negative electrode layer, a separation film and a positive electrode layer arranged in a first direction; and a case in which the electrode assembly is accommodated, the case including a first pressing portion which faces a first side surface of the electrode assembly accommodated in the case and applies a first pressing force to the electrode assembly along the first direction. The first pressing portion includes: a first surface facing the first side surface of the electrode assembly accommodated in the case; and a second surface opposite to the first surface and exposed outside the case, the second surface of the first pressing portion including a plurality of first curved grooves arranged along the first side surface of the electrode assembly accommodated in the case and lengthwise extending in a second direction crossing the first direction.

Claims20

Dependent claims

A secondary battery comprising:

an electrode assembly comprising a negative electrode layer, a separation film and a positive electrode layer arranged in a first direction;
and
a case in which the electrode assembly is accommodated, the case comprising a first pressing portion which faces a first side surface of the electrode assembly accommodated in the case and applies a first pressing force to the electrode assembly along the first direction,
wherein the first pressing portion comprises:
a first surface facing the first side surface of the electrode assembly accommodated in the case;
and
a second surface opposite to the first surface and exposed outside the case, the second surface of the first pressing portion comprising a plurality of first curved grooves arranged along the first side surface of the electrode assembly accommodated in the case and lengthwise extending in a second direction crossing the first direction.

4 more elements

A secondary battery comprising:

an electrode assembly comprising a negative electrode layer, a separation film and a positive electrode layer arranged in a first direction;
a case in which the electrode assembly is accommodated, the case comprising a first exterior wall portion exposed to outside the case and facing a first side surface of the electrode assembly accommodated in the case;
and
a first pressing portion which is arranged between the first side surface of the electrode assembly accommodated in the case and the first exterior wall portion of the case and applies a first pressing force to the electrode assembly along the first direction,
wherein the first pressing portion comprises:
a first surface facing the first side surface of the electrode assembly accommodated in the case;
and
a second surface opposite to the first surface, the second surface of the first pressing portion comprising a plurality of first curved grooves arranged along the first side surface of the electrode assembly and lengthwise extending in a second direction crossing to the first direction.

5 more elements

Dependencies are inferred from the claim text.

Secondary battery

Life of this patent

Secondary battery

Life of this patent

Abstract

Claims20